======================== unified (from filesystem) ========================
                                         'bitrate'  '163.913'
                                        'duration'  '515'
                                          'artist'  'Claude Debussy'
                                     'text_people'  ''
                                         'release'  'Berliner Philharmoniker - Herbert Von Karajan'
                                           'title'  "La Mer I - De l'aube à midi sur la mer. Très lent"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['impressionist', 'composers', 'piano', 'french', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1966'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '145.3'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'COMM:Comment:XXX'                                  'Berliner Philharmoniker'
'MCDI' (Music CD identifier)                        MCDI(data=b'\x00:\x01\x06\x00\x10\x01\x00\x00\x00\x00!\x00\x10\x02\x00\x00\x01\x1e\\\x00\x10\x03\x00\x00\x01\xb5\xd3\x00\x10\x04\x00\x00\x02#\x1a\x00\x10\x05\x00\x00\x02\xaf\xba\x00\x10\x06\x00\x00\x03\xbe#\x00\x10\xaa\x00\x00\x04k\x93')
'TALB' (Album/Movie/Show title)                     'Berliner Philharmoniker - Herbert Von Karajan'
'TBPM' (BPM (beats per minute))                     '145.3'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRL' (Release time)                               '1966'
'TENC' (Encoded by)                                 'Greg'
'TIT2' (Title/songname/content description)         "La Mer I - De l'aube à midi sur la mer. Très lent"
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Claude Debussy'
'TRCK' (Track number/Position in set)               '2'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.92, VBR 3, Stereo, High quality'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['impressionist', 'composers', 'piano', 'french', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.16 dB'
'TXXX:replaygain_track_peak'                        '0.842430'

========================== row from database ==========================
                                              'id'  1507547
                                            'path'  /data/Music/Bulk/00instruments-classical/Debussy/Debussy C. - 02 - La Mer I - De l_aube _ midi sur la mer. Tr_s lent.mp3
                                         'working'  None
                                         'bitrate'  163
                                    'duration_sec'  515
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  10561407
                                           'mtime'  1620561531
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical C. 02 l_aube _ Tr_s prerock classical or classical instruments
                                      'tag_artist'  Claude Debussy
                                     'tag_release'  Berliner Philharmoniker - Herbert Von Karajan
                                       'tag_title'  La Mer I - De l'aube à midi sur la mer. Très lent
                                             'bpm'  145.3
                                    'search_title'  'a':8,9 'aube':6 'de':4 'i':3 'l':5 'la':1 'laube':7 'lent':15 'mer':2,12 'midi':10 'sur':11 'tres':13,14
                                   'search_artist'  'claude':1 'debussy':2
                                  'search_release'  'berliner':1 'herbert':3 'karajan':5 'philharmoniker':2 'von':4
                                     'search_rest'  '00instruments':1 'aube':6 'c':3,4 'classical':2 'instruments':11 'l':5 'or':10 'prerock':9 's':8 'tr':7
                                    'search_combo'  '00instruments':23 'a':8A,9A 'aube':6A,28 'berliner':18C 'c':25,26 'classical':24 'claude':16B 'de':4A 'debussy':17B 'herbert':20C 'i':3A 'instruments':33 'karajan':22C 'l':5A,27 'la':1A 'laube':7A 'lent':15A 'mer':2A,12A 'midi':10A 'or':32 'philharmoniker':19C 'prerock':31 's':30 'sur':11A 'tr':29 'tres':13A,14A 'von':21C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['impressionist', 'composers', 'piano', 'french', 'classical']
                                        'tag_date'  1966
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561530.753826  (2021-05-09 13:58:50)
                             'size'  10561407